linux-kernel - [PATCH v4 05/21] ARM: dts: imx7-colibri: add recovery for I2C for iMX7

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Date:   Mon, 12 Aug 2019 14:21:21 +0000
From:   Philippe Schenker <philippe.schenker@...adex.com>
To:     Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Max Krummenacher <max.krummenacher@...adex.com>,
        "stefan@...er.ch" <stefan@...er.ch>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michal Vokáč <michal.vokac@...ft.com>,
        Fabio Estevam <festevam@...il.com>
CC:     Oleksandr Suvorov <oleksandr.suvorov@...adex.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH v4 05/21] ARM: dts: imx7-colibri: add recovery for I2C for
 iMX7

From: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>

- add recovery mode for applicable i2c buses for
  Colibri iMX7 module.

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>

---

Changes in v4:
- Make scl-gpios and sda-gpios (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)
- Change commit title to Michal's suggestion

Changes in v3: None
Changes in v2: None

 arch/arm/boot/dts/imx7-colibri.dtsi | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/imx7-colibri.dtsi b/arch/arm/boot/dts/imx7-colibri.dtsi
index a8d992f3e897..cab40d22d24e 100644
--- a/arch/arm/boot/dts/imx7-colibri.dtsi
+++ b/arch/arm/boot/dts/imx7-colibri.dtsi
@@ -140,8 +140,12 @@
 
 &i2c1 {
 	clock-frequency = <100000>;
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c1 &pinctrl_i2c1_int>;
+	pinctrl-1 = <&pinctrl_i2c1_recovery &pinctrl_i2c1_int>;
+	scl-gpios = <&gpio1 4 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio1 5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+
 	status = "okay";
 
 	codec: sgtl5000@a {
@@ -242,8 +246,11 @@
 
 &i2c4 {
 	clock-frequency = <100000>;
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c4>;
+	pinctrl-1 = <&pinctrl_i2c4_recovery>;
+	scl-gpios = <&gpio7 8 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio7 9 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 };
 
 &lcdif {
@@ -540,6 +547,13 @@
 		>;
 	};
 
+	pinctrl_i2c4_recovery: i2c4-recoverygrp {
+		fsl,pins = <
+			MX7D_PAD_ENET1_RGMII_TD2__GPIO7_IO8	0x4000007f
+			MX7D_PAD_ENET1_RGMII_TD3__GPIO7_IO9	0x4000007f
+		>;
+	};
+
 	pinctrl_lcdif_dat: lcdif-dat-grp {
 		fsl,pins = <
 			MX7D_PAD_LCD_DATA00__LCD_DATA0		0x79
@@ -740,6 +754,13 @@
 		>;
 	};
 
+	pinctrl_i2c1_recovery: i2c1-recoverygrp {
+		fsl,pins = <
+			MX7D_PAD_LPSR_GPIO1_IO04__GPIO1_IO4	0x4000007f
+			MX7D_PAD_LPSR_GPIO1_IO05__GPIO1_IO5	0x4000007f
+		>;
+	};
+
 	pinctrl_cd_usdhc1: usdhc1-cd-grp {
 		fsl,pins = <
 			MX7D_PAD_LPSR_GPIO1_IO00__GPIO1_IO0	0x59 /* CD */
-- 
2.22.0